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Date: 2012-07-12 09:41:46Agricultural soil science Functional groups Agronomy Fertilizer Nitrate Soil test No-till farming Soil Nitrogen metabolism Chemistry Soil science | Paul Kassel: 2007 Growing Season—CornAdd to Reading ListSource URL: www.extension.iastate.eduDownload Document from Source WebsiteFile Size: 77,33 KBShare Document on Facebook |